Apple was PC king in the period October-December , shipping 31 million iPads, Macs.

It accounts for one in 5 of all PCs sold.

Apple's share of the tablet market increased to 34%, + 7% on Q3 with the launch of the iPad Air and mini with Retina providing a "much needed boost."

But competition is mounting and Android tablets are falling in price, which will put pressure on iPad in 2014, analysts warn.

Samsung with Galaxy Tabs and Note was No. 2 in the tablet race, and No. 3 in Pc's overall (tablets accounted for 80% of Samsung PCs).

Similar to the phone market, Apple and Samsung combined accounted for over half all tablets shipped.

But Samsung's growth came at a price, and had to resort to significant promotional activity to run down inventory, note analysts.

"Android is now the most popular OS in the tablet segment and PC vendors are showing a keen interest in Chromebooks, which are carving out a niche, especially in the education sector," said Pin Chen Tang, Research Analyst.

'Consumers are becoming more open to Windows alternatives, and Google's low-cost options are reaping the rewards,'

The Chinese giant was early to embrace Android as a tablet OS, while rivals HP and Dell waited for Windows 8, and their tablet and notebook strategy has now paid off.

'Lenovo still has the potential to grow its global notebook shipments and has emerged as a challenger in the tablet space,' said James Wang, Analyst.

'Worldwide, Lenovo shipped three times as many tablets in Q4 as HP and Dell combined, or two and a half times when excluding China.'

Windows 7 or 8?

Demand for PCs is lifting as businesses migrate from Windows XP. But Windows 8 will not be a major beneficiary as many will opt for safer Windows 7, as Microsoft touch screen OS fails to charm enterprise users, Canalys warns.

Windows 8 uptake remains weak and the PC refresh cycle shows no sign of returning, bad news for all PC giants including HP, Dell and Acer. HP, recently opted to push Windows 7 PC's over 8, due to "popular demand".

With Windows 9 reported to be scheduled for an April 2015 release, Microsoft risks losing momentum unless it does something drastic to turn its Windows business around, say analysts.

This provides an opportunity for vendors with strong enterprise sales and an established B2B channel in 2014, but PC makers heavily exposed to the consumer notebook market face an uncertain future.